360 pistons

70aarcuda said
Currently have a very good running 360 with the Speed Pro h116cp pistons in it....with SM CNC heads....
also got another good running 360 with KB107 pistons with same kind of heads on it....so spend your money...

the speed pro motor was not rebalanced and is externally balanced.....the kb107 motor is internally balanced..
Click to expand...

Do you run either engine on pump gas 91-93 oct. KB says the 107 will protrude from the deck on a magnum block and produce 10.9 compression with a 62cc chamber head.
I have the iron magnum heads with 62cc chamber and wondering if 10.9 is to much for iron heads and 91-93 pump gas.